Connect 3 cameras via wifi or bluetooth?

n3wb

A newbie question: Do I want this connection to be wifi or bluetooth?
I want to wirelessly connect three mini spy cameras in a vehicle to a cell phone.
The cell phone will have an app that will record all three cameras and occasionally
send the audio and video to the cloud for storage.
Have I given you enough information? Any other questions that need to be answered?
Any help is greatly appreciated.
Thanks, people.
Mark2464